1321123110000 has 200 divisors, whose sum is σ = 4380029054544. Its totient is φ = 342777600000.

The previous prime is 1321123109951. The next prime is 1321123110007. The reversal of 1321123110000 is 113211231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321123110007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 514900 + ... + 1705100.

Almost surely, 2^{1321123110000} is an apocalyptic number.

1321123110000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321123110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2190014527272).

1321123110000 is an abundant number, since it is smaller than the sum of its proper divisors (3058905944544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321123110000 is a wasteful number, since it uses less digits than its factorization.

1321123110000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190269 (or 1190248 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1321123110000 its reverse (113211231), we get a palindrome (1321236321231).

It can be divided in two parts, 1321 and 123110000, that added together give a palindrome (123111321).

The spelling of 1321123110000 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-three million, one hundred ten thousand".